CVE-2026-86287

HIGHPre-NVD 7.57.5
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-07. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths.

Non-numeric and non-ASCII prefix lengths are accepted and treated as 0. Integers over 31 bits are silently truncated. A single malformed mask will poison the lookup table.

The result is that the lookup will silently succeed for every address. An allow-list will allow every address, and a deny-list will block every address.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-86287: Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths

http://www.openwall.com/lists/oss-security/2026/09/07/1

Vendor Advisories for CVE-2026-86287(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 01:30 UTCEG score recompute
  2. 2026-09-19 01:30 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 13:25 UTCGHSA enrichment
  5. 2026-09-18 01:19 UTCEG score recompute
  6. 2026-09-18 01:19 UTCGHSA enrichment
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-17 13:14 UTCGHSA enrichment
  9. 2026-09-17 01:07 UTCEG score recompute
  10. 2026-09-17 01:07 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 13:01 UTCEG score recompute
  13. 2026-09-16 13:01 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-16 00:56 UTCGHSA enrichment
  16. 2026-09-15 12:50 UTCEG score recompute
  17. 2026-09-15 12:50 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 00:44 UTCGHSA enrichment
  21. 2026-09-14 12:38 UTCGHSA enrichment
  22. 2026-09-14 00:26 UTCEG score recompute
  23. 2026-09-14 00:26 UTCGHSA enrichment
  24. 2026-09-13 12:20 UTCGHSA enrichment
  25. 2026-09-13 00:14 UTCEG score recompute
Show 26 more
  1. 2026-09-13 00:14 UTCGHSA enrichment
  2. 2026-09-12 12:08 UTCGHSA enrichment
  3. 2026-09-12 00:02 UTCEG score recompute
  4. 2026-09-12 00:02 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 11:56 UTCEG score recompute
  8. 2026-09-11 11:56 UTCGHSA enrichment
  9. 2026-09-10 23:50 UTCGHSA enrichment
  10. 2026-09-10 11:25 UTCEG score recompute
  11. 2026-09-10 11:25 UTCGHSA enrichment
  12. 2026-09-09 23:17 UTCGHSA enrichment
  13. 2026-09-09 07:56 UTCEG score recompute
  14. 2026-09-09 07:56 UTCGHSA enrichment
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-08 19:51 UTCGHSA enrichment
  17. 2026-09-08 18:50 UTCEG score recompute 7.50
  18. 2026-09-08 18:50 UTCGHSA enrichment
  19. 2026-09-08 18:49 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  20. 2026-09-08 14:35 UTCGHSA enrichment
  21. 2026-09-07 21:31 UTCGHSA enrichment
  22. 2026-09-07 21:30 UTCNVD update
  23. 2026-09-07 20:20 UTCMITRE cvelistV5
  24. 2026-09-07 19:26 UTCNVD update
  25. 2026-09-07 18:30 UTCEG score recompute
  26. 2026-09-07 18:30 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86287?
CVE-2026-86287 is a high vulnerability published on September 7, 2026. Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths. Non-numeric and non-ASCII prefix lengths are accepted and treated as 0. Integers over 31 bits are silently truncated. A single malformed mask will poison the lookup table. The result is that the lookup will silently succeed…
When was CVE-2026-86287 disclosed?
CVE-2026-86287 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86287 actively exploited?
CVE-2026-86287 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86287?
CVE-2026-86287 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86287?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86287, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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